FMSLogo Code

Update the expected version to 7.0.0, in preparation for the next release.

Update the test log to match the expected results for the wxWidgets version of FMSLogo. The log had previously been the output from the OWL version, but this version no longer exists.

Remove a work-around that was added for the Borland Resource Compiler which made the translated strings harder to read. Specifically, "http://" is no longer written as "http:\x2F/". Since FMSLogo is no longer compiled with Borland's compiler, this work-around is no longer needed.

Drop support for paletted display devices. After dropping suppport for Windows 95/98/ME, the logic for populating and clearing the system palette became unneeded as there are no longer any display devices which use a color palette. By removing the logic to support this now-defunct technology, the FMSLogo code base is made simpler and easier to port to a non-Windows platform using pure wxWidgets API.

Rework the #ifndef WX_PURE so that paste_all_turtles() is called
when compiling for non-Windows platforms (which was the entire
purpose of the previous change to make it take a wxDC, instead
of an HDC). So now the turtle appears on GNU/Linux.

Change paste_all_turtles so that it uses a wxDC instead of a HDC, which is only available on Windows. This was done to make the turtle appear on the experimental version of FMSLogo that runs on GNU/Linux.

Fix a problem introduced in the previous revision where the mkdir didn't get called (I had thought that "?" was the character that disables echo, but it's "@", and after using it, I released that it's not what I want either, as it doesn't mute the response).

Fix a build break when using precompiled headers and building for
non-Windows platforms.

Fix a problem with the Makefile where modifying a header did not
cause the precompiled header (which includes all of them) to be
rebuilt.

Add support for precompiled headers in the build for the main FMSLogo environment (not the screensaver). On my machine, this reduced the build time of each executable from ~3m 30s to ~1m 30s.